New Revision of MDCG 2020-16 Guidance on IVD Classification: Key Updates in Version 4
The Medical Device Coordination Group (MDCG) published Revision 4 of its guidance document MDCG 2020-16, titled "Guidance on Classification Rules for in vitro Diagnostic Medical Devices under Regulation (EU) 2017/746". This updated version provides further clarification on the application of the classification rules outlined in Annex VIII of the IVDR.
MedNet EC-REP
Author

As the European Authorised Representative for many IVD manufacturers, MedNet EC-REP supports its clients in understanding and implementing these regulatory updates. Below, we highlight the main changes introduced in Revision 4 and what they mean for IVD manufacturers placing products on the EU market.
What’s New in Revision 4?
The main changes in this revision concern the SARS-CoV-2 tests. They are now no longer classified in class D, but in class C in the case of self-tests and in class B in the case of tests for professional use. This is reflected in the amended examples for Rule 1 (second indent), Rule 4 and Rule 6.
With this revision, the MDCG continues its effort to improve regulatory clarity and support consistent implementation across the EU. Manufacturers are encouraged to review the updated guidance in detail and assess whether any of their products may be affected by the revised interpretation of classification rules.
Download the full Document: MDCG 2020-16 rev.4
Related Articles

Well-Established Technologies Under the MDR: EU Commission Expands Exemption List
The EU Commission has expanded the WET list under the MDR, easing requirements for certain class II and class III devices.

MHRA Device Registration: New Clarification on "Placing on the Market" and "Putting into Service" (Update 20 July 2026)
MHRA clarifies medical device registration: 20 July 2026 update explains "placing on the market" vs. "putting into service" in GB.

EC REP Becomes EU REP: What the New Authorised Representative Symbol Means for Medical Device Manufacturers
In short: On 17 June 2026, the European Commission published the reference of EN ISO 15223-1:2021/A1:2025 in the Official Journal of the European Union (OJEU) for both the MDR and the IVDR. This amendment replaces the long-standing "EC REP" symbol with "EU REP" for the authorised representative in the European Union. The change is purely editorial, and you have a five-year transition period - until 17 June 2031 - during which both symbols remain valid.
Stay Updated
Get the latest regulatory updates and industry insights delivered to your inbox.
Subscribe to Updates